As the Dr. said the challenger is pretty small hence the anchor would is too, unless you have a really bad lower back hoisting it by hand should be easier than installing an elec windlass. Not to mention that w/o some form of cantilevered bow pulpit, the winch would tend to run the anchor stock into the hull. I haven't seen a windlass installed on an 18+ foot run-about, but as johnathon say's somebody probably has?